Antiskidding attachment.



hattan and State of New UNITED STATES PATENT orrioa.

JOHN V. KNOTH, OF NEW YORK, N. Y., ASSIGNOR TQ POLACK TYRE COMPANY. A

' CORPORATION OF MAINE.

ANTISKIDDING arraonrvinivr.

Specification of Letters Patent.

Patented Jan. '7, 1913.

Application filed November 22, 1911. Serial No. 661,649.

To all whom it may concern Be it known that I, JOHN V. KNOTH, a citizenof the United States, residing at the city of New York, in the boroughof -Man- York, have invented certain new and useful Improve ments inAnti'skidding Attachments, of which the following is a-full, clear, andexact description.

This invention relates to vehicle tires and more particularly toanti-skidding attach ments for tires of solid rubber, or the like, ofthe well known dual type commonly used upon heavy trucks.

Devices of this character are usually highly injurious to the tires,cutting and tearing them in use, and they become quickly worn away inpractice to such an extent as to be practically worthless.

One of the objects of my invention is to provide an eilicientanti-skidding attachment for vehicle tires that will exert a minimumwearing action upon the tire and which will withstand long and hardusage without impaired eifectiveness.

Another object of my invention is to ,pro

vide aconstruction simple and cheap to manufactureand composed of aminimum number of parts.

These and other objects of my invention will be hereinafter referred toand the novel elements and combinations of elements whereby said objectsare accomplished will be more particularly set forth in the appendedclaims.

In the accompanying drawings which form a part hereof, and in which likereference characters designate like parts throughout the several views,I have exemplified a preferred form of my invention. I am aware,however, that various modifications and changes may be made thereinwithout departing from the spirit of my invention, and I accordinglydesire to be limited only by the scope of the appended claims.

In thedrawings: Figure 1 is a side view of a portion of my improvedanti-skidding attachment or chain, applied to a fragment of a dualvehicle tire, the tire being shown in longitudinal centralcross-section, and Fig; 2 is a cross-section of a dual tire and of myimproved anti-skidding chain, drawn to a slightly larger scale than Fig.1.

Referring to the drawings by numerals, 1.

of links 4 have been designated 5 and 6,

and mounted upon members 5 are spherical balls 7, of steel or likematerial. These balls are free to rotate upon the members 5,

which act as axes or spindles, and are also slidable longitudinallythereon; they are shown in the drawings to be of a diameterapproximately equal to the exterior width of the links 3 and 4.

It is to be understood, of course, that my chain encircles the entirewheel tire, its ends being secured together in any manner whereby theymay be readily attached to, and detached from, the tire. The drawingshows (Fig. 1) the ends of the chain attached together by means of abolt- 8, provided with a washer 9, which bolt engages the two end linksof the chain, and a ,suitable washer and nut (not shown) on the otherside of the chain. Obviously, however, a turnbuckle or like means may beused for this purpose if desired.

My improved chain is mounted upon the tire in such a way that the sidemembers 6 of the links 4 wedge into the triangular groove between thetwo members of the tire, and links 3 engage on either side the two tiremembers thus positioning the balls 7 between the inner arcuate faces ofthe members 2, said balls extending from the wheel felly a distanceslightly less than the tire members, where it has been found they exert.the greatest anti-skidding effectiveness.

In use any transverse pressure upon thet-ire," caused by the vehiclemaking a turn, will press the balls 7 against one or the other of the"arcuate faces of the tire members, depending of course upon thedirection of the transverse pressure. The balls 7 will be caused torotate about their axes 6. and their 105 direction of rotation willalways be such as to press the face of that portion of the tire withwhich they happento be in contact, toward itsbase. In. other words, ifthe balls are pressed against the right hand member oi the tire, asviewed in Fig. 2, the direction of rotation of the balls Will beclockwise, Whereas they will rotate in the opposite dii ectionit pressedagainst the left hand member. it will thus be seen that thebal-ls, Whiletending tc arrest skiddin action, minimize the tendency te strip thetire froin the Wheel by reuse-1s 0f i-is contact.- With the roedberl,since sei bells when under transverse stress keep constmtly rolling therubber of the tire the Wheel.

"yififiiilfi? important advantage possessed by iel resides in thefactthet es the hereon is distributed e.- ire eircuziiterence and is notsew lei enepertion only which Wouid seen fist and. neutralize theirefi'i ciency. This ef eeui'se adds greatly to the 'life cf the viceAnother advantage is gained by the longituclinel play at the bails entheir axes, since they are thus bi'eiiglit irate engegementwit-h(iifleremt'pwtiens of rubber tire in use,

lius preventing the iiijtesious effect of eontli" tire at one point.F111- t the chain is prefei l ez'euml the tire and. further is IlOmwearing the tire etfewer 0f the elongated ifetstmg balls may be esect,fl'illlii ales RS 2. v

tle ttiesire to be limited. to-bells of wiSOill s eiricsl configumtlon,since elei ge "d i'eliers might be used. Withie the purview my'inVei1tion,' butI have found.

in. pi'ectiee that the spherical balls give the best results. Neither doIdesire te be limitetl te e chain to connect thelinks 4, since anysuitable flexible means may be used for this purpose, my inventionresiding in the prevision cf the rotating elements which I have foundeenstitute veryeffective mitiskicigling means.

l'lf tcencl'desimble, i may meunt more than one i'eveluble memlo 1'(mike spaced links 4:,- and may make these links longer tosec-emmo'zlete epiumlity c1 revolu'ble members and may cu ve the iiIlkSte conform to the shepe them It is to be obseryeii that my invention isficpiea E32: gates? may; be obtained for five cents each, by in.

Weehingte w the tire at any paint ees; es

not limited in use to the particular type of dual tire SllGWIl in thedrawing since it is aciaptecl for use with any tire having sciircumferentiel groove in its treads Having described my invention, Itciaim: '1. In en enti-skidtling attachment resilient duel vehicle tirehaving e grccve between the respective sicies tiierect, fieyii blecarrier mis it-eel to be received into the groove store i'lexi lecirciing the '7 s in pessit-ioii themes plurality 0t speceii i'cilei'srotstsioly mounted upon said Carrie, ssici reliers edspteci te beerciirectiy sminst 1e tire parts and her/- ing smeoth 's at points Wherethey Contact With' said parts whereby t0 obviate the likelihcoci ofinjuring the tire when forci bly driven theretowsrcL seid surfaces beingsubstantially elevoid of sharp bends and tin-- gles, anal the axes ofrotation of the respective lOiiQTS being substantialiy tangential to theencircling carrier,

2. in 2.11 enti-skidcling attachment fer :1 dual vehicle tire havinggroove betweee the respective sides thereof a flexible carries adapter}.tn berecei'vee. nto the groove sei, said flexible esi'rie-I' ejncLoiizigthe 1 position thereen (1d comprising a of evel iiniis, 1'01 ersmousiefl 'u eoii m of said l'OliQlS else only i ed cterl t final Men M sT v... i

1o sale tews ,i 1 161181 VSti being; disposed upon ene s upon which itited adapted to mt? iliQ-Ciiilll seioi tire, and e longituc ileliy l InWitness ture, in the W itiiesses

